/Engine/Source/Runtime/MovieSceneTracks/Public/Sections/MovieSceneParameterSection.h
Adds a a key for a specific vector2D parameter at the specified time with the specified value.
void AddVector2DParameterKey ( [FName](API\Runtime\Core\UObject\FName) InParameterName, [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) InTime, FVector2D InValue )